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Questions  >>  CBSE XII  >>  Math  >>  Integrals
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Evaluate: $\large \int \frac {1 + \tan^2 x} {\sqrt (1 - \tan^2 x)}\; $$dx$

$\begin{array}{1 1}(A) \sin^{-1} (\tan x) + k \\ (B) \cos^{-1} (\tan x) + k \\ (C) \sin^{-1} (\cot x) + k \\ (D) \cos^{-1} (\sec x) + k \end{array} $

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